baber/WOPTO huggingface dataset:
Patent GB-817091-A (GB)
Title: Improvements in electrode supports
Inventor: RANGABE ALEXANDER RIZO
IPC: H01J19/42
Filed: 1956-04-06
Abstract: 817,091. Discharge tubes. PLESSEY CO. Ltd. April 1, 1957, No. 10540/56. Class 39(1). An electrode support comprises a metal frame a, Fig. 2, filled with ceramic material c having holes d for accommodating the electrodes or their support wires, the ceramic being fired and sintered in situ within the frame. The frame may be of a chromium stainless steel, and the ceramic an alumina or aluminium silicate type. Several such supports, the frames connected by strips h, may be made and fired together, Fig. 5. After separating, the residual ends of the strips may form convenient connecting or support tags.
Patent GB-1214672-A (GB)
Title: Aircraft radio-signal gain control
Inventor: BLACKLEDGE VERNON OSCAR
IPC: B64D45/04
Filed: 1968-03-05
Abstract: 1,214,672. Radio navigation; gain control. SPERRY RAND CORP. 5 March, 1968 [17 March, 1967], No. 10544/68. Headings H4D and H4R. Relates to a circuit for varying the gain of a radio navigation signal which controls an aircraft automatic pilot or flight director system during an airport approach. According to the invention a distance signal representing the distance between the aircraft and the radio beam transmitter is fed to the gain control circuit and a timing circuit is arranged on failure of the distance signal to control the gain as a function of time whereby gain is reduced as the aircraft approaches the transmitter even when the distance signal fails. The timing circuit may be up-dated by the distance signal. The invention is described with reference to the glide-slope of an I.L.S. system, the gain varying with a predetermined ratio of signal magnitude to altitude from an initial altitude of 1500 ft. to 100 ft. at which point the ratio is changed such that the gain is rapidly reduced to zero at flare altitude e.g. 50ft., Fig. 2 (not shown). For gain with time, the gain is reduced by a first time characteristic from an initial value to a lower gain at the I.L.S. middle marker whereat the gain is reduced by a different time characteristic to substantially zero at or near the runway threshold. Detailed circuit, Fig. 1.-The normal D.C. signal from receiver 10 after modulation is applied to variable gain amplifier 12 comprising a transistor 14 the gain being controlled by a circuit 32 consisting of a transistor 15 the impedance-to-earth of which is connected to the emitter of transistor 14; the gain of amplifier 12 is an inverse function of the emitter impedance-to-ground which in turn is an inverse function of the D.C. current through diodes 17, 18. Distance signal gain variation is derived from radio altimeter 20, a D.C. signal proportional in sense and magnitude to instantaneous altitude appearing on line 27. Circuit 33 comprises a transistor 34 which in association with diode 36 and circuit 40 causes the output of a transistor 41 to decrease with "radio" altitude when in normal glide slope operation; ground depressions are rendered ineffective by resistor 46. If the altimeter fails, loss of voltage on lead 22 actuates transistor switch 47 so as to earth lead 40 and hence turn off transistor 41, gain control then being effected by discharge of capacitors 51, 52 through resistors 53, 57, 58; when the middle marker is reached transistor switch 65 is energized to short potentiometer 66 to ground and transistor switch 63 is energized to afford a further discharge path through resistor 61<SP>1</SP>. The discharge rate is made more rapid when the middle marker is reached. Potentiometer 67 is set to allow zero gain to be reached. If the altimeter fails before the glide slope is engaged, or if there is no altimeter, a twostep timing programme is provided.
Patent GB-145917-A (GB)
Title: Improvements in and relating to ignition plugs for internal combustion engines
IPC: H01T13/16
Filed: 1919-04-29
Abstract: 145,917. Umpleby, R. D., and Umpleby, F. April 29, 1919. Sparking-plugs.-The central electrode and casing are made hollow and contain a liquid having electrical insulating properties, such as resin oil, which may be circulated among a number of plugs and cooled in a common radiator.
Patent GB-142452-A (GB)
Title: Improvements in plansifters
IPC: B07B1/38
Filed: 1920-04-15
Abstract: 142,452. Blumer, H., (Assignee of Buhler, Geb.). April 30, 1919, [Convention date]. Addition to 101,591. Sieves with compound or variable motion.- In a modification of the plansifter described in the parent Specification, the balancing weight 1 is suspended from the pendulum shaft 2 by a bearing arrangement, and is connected to the shaft by a spring 10. In the arrangement shown, the weight is provided with a steel point 8 adapted to rest in one of a number of steps or bearings 9 provided in a head 7 carried at the end of the shaft. A knife-edge bearing may be used instead of the steel point. The Specification as open to inspection under Sect. 91 (3) (a) states also that the balancing weight may be suspended from a spring intermediate member. This subject-matter does not appear in the Specification as accepted.
Patent GB-1278541-A (GB)
Title: Radio transmitters and equipment using the same
Inventor: EARP CHARLES WILLIAM
IPC: G01S13/78
Filed: 1970-03-05
Abstract: 1278541 Amplitude modulators; pulse radar STANDARD TELEPHONES & CABLES Ltd 5 March 1970 10624/70 Headings H3R and H4D A radio transmitter such as used in aircraft DME includes an R.F. carrier generator 1, D.C. pulse sources 9, 10 for supplying pairs of first and second pulses overlapping in time as shown at Fig. 2(a), 2(b), a balanced R.F. modulator producing a series of pulses as in Fig. 2(c), having an envelope cusped at an intermediate point 11 at substantially zero amplitude level and wherein the R.F. carrier undergoes a phase reversal at point 11 and an arrangement, e.g. amplifier 4, antenna 5 for transmitting said pulses. The modulator comprises transformers 2, 3 connected to capacitor, diode arms 6, 7 and modulating inputs to which load resistors 8 are connected. D.C. pulses are applied directly from source 9 and via a delay network 10 to the modulator. Alternatively an arrangement (Fig. 3, not shown) comprising a pulse source (20), delay networks (23, 26), inevrters (24, 27) wherein D.C. pulses (Figs. 4d, 4h, not shown) are produced via two pulse shaping networks comprising two resistance-capacitance networks (32-34, 37-39) each having a charge and discharge rate which are inverse of one another. The asymmetrical nature of the D.C. pulses is obtained by making one of the resistances much larger than the other. The output of the modulator is a waveform similar to Fig. 2(c). A receiver (Fig. 5, not shown) suitable for receiving signals having the waveform indicated comprises selective circuits (51), a detector (52) with an associated AGC loop followed by a limiter (53) and differentiating circuits (54, 56). A negative going edge (55, Fig. 6e) or a positive going edge (57, Fig. 6f) of the differentiated pulse gives an estimation of the time position of the received pulse.
Patent GB-1386708-A (GB)
Title: Boats
IPC: B63H21/30
Filed: 1973-03-05
Abstract: 1386708 Acoustic insulation of boats' engines E SAMUELSSON and A SAMUELSSON 5 March 1973 [13 Dec 1972] 10632/73 Headings B7S and B7V A boats' engine 1 is mounted in a box 4 which in turn is smaller than and is mounted within a hull compartment by sound insulating distance means 6 such as rubber blocks the compartment having a cover 3b which when closed is spaced from the upper surface of the engine box 4. The space 7 around the box 4 may be filled with air. Alternatively, the space 7 is filled with a solid insulating material. In the former case, an ejector operated by water flowing past the hull reduces the pressure of air in the gap, Fig. 8 (not shown). The box, along with the engine, can be lowered into and lifted out of the compartment. Further insulation is given by a plastics hood 8a, 8b which covers the outboard drive unit 2 and in the rest position of the boat extends below the waterline. When the boat is under way the bottom of the hood is only slightly above the waterline. An engine air intake may be incorporated in the hood. The hood is mounted on the hull by rubber blocks 9 and any remaining gap between the hood and the hull is filled by insulating material. In a modification, Figs. 3 and 4 (not shown), the hull compartment is located forwardly of the transom and an inboard drive is used. Air for the engine enters the box through a conduit communicating with an opening in the side of the hull, and the rear end of the propeller shaft is supported from a plate which is mounted on the hull by means of insulating blocks. Operating cables or rods enter the box through insulating packings contained in plastics tubes, Fig. 6 (not shown), and such operating elements may themselves include insulating portions, Fig. 9 (not shown).
Patent GB-1087337-A (GB)
Title: Alkylbenzene sulphonate detergent compositions
IPC: C11D1/22
Filed: 1965-03-12
Abstract: A detergent composition comprises a mixture of alkylbenzenesulphonates [e.g. of Li, Na, K, NH3, Ca, Mg, NH2C2H4OH or N(C2 H4OH)3] in which the alkylbenzene portion has an average mol. wt. 250-270, the alkyl groups are linear and contain at least 85% C12- 14 and at least 10% each C12, C13 and C14 chains, the sulphonates having at least 37% 5-(or higher) phenylalkanes and at most 27% 2-phenylalkanes.  Other ingredients specified are Na2SO4, Na2CO3, K2CO3, Na4P2O7, Na3PO4, Na5P3O10, K5\P3O10, (NaPO3)6, Na- and K-silicates (e.g. Na2O + 1-3 SiO2), Nacarboxymethylcellulose, persulphates, perborates, percarbonates, lauric or coconut diethanolamide, monoethanolamide, isopropanolamide and their oxyethylated derivatives, lauryl and cetyl alcohols, dodecyldimethylamine oxide, Na- and K-xylene- and toluene-sulphonates, C8- 20 alkyl sulphates and sulphonates, sulphated alkylphenol- and alkanol-ethylene oxide condensates, polyethylene glycol ethers and esters, polyvinyl alcohol, Na salt of 85:15 tallow-coconut fatty acids, silica, trichlorocyanuric acid, chlorinated Na3PO4 and oxalic acid.  A suitable starting material is an unbranched C11- 15 paraffin mixture, containing 34% C12, 43% C13 and 17% C14, prepared by selective absorption on molecular sieves of kerosene, followed by fractionation of the desorbed linear hydrocarbon.  The product is monohalogenated and reacted with benzene (+ AlCl/HCl). The undesired 2-phenylalkane is separated by distillation from the desired 5-(or higher)phenylalkane and recycled to the alkylation reactor.  The alkylation of benzene with alphaolefins having at least 85% C12- 14 chains, in presence of HF, is also mentioned.ALSO:The invention comprises a mixture of alkyl-benzenesulphonates [e.g. of Li, Na, K, NH3, Ca, Mg, NH2C2H4OH or N(C2H4OH)3] i which the alkylbenzene portion has an average mol. wt. 250-270, the alkyl groups are linear and contain at least 85% C12- 14 and at least 10% each C12, C13 and C14 chains, the sulphonates having at least 37% 5 (or higher)-phenylalkanes and at most 27% 2-phenylalkanes.  The alkylbenzene having the specified properties is sulphonated by a standard procedure.  A suitable starting material is an unbranched C11- 15 paraffin mixture containing 34% C12, 43% C13 and 17% C14, which is monohalogenated by reaction with one third mol. Cl2 to give internally chlorinated hydrocarbons.
Patent GB-298051-A (GB)
Title: Improvements in devices for setting the edges of razors and the like
IPC: B24D15/10
Filed: 1928-04-11
Abstract: 298,051. Nielsen, C. A. H., April, 11, 1928. Sharpening by magnetic action. - In setting razor blades i by the flux from magnet poles a, b the blades are placed on interengaging studs e or f in a two-plate carrier g-d which is placed on a block of wood c between the magnet poles to prevent contact of the blades with the poles. The device is enclosed in a casing m, and a cover k has a fulcrum point l on which a blade can balance and rotate to correct polarity position, so that it may be inserted in the device in that position.
Patent GB-439777-A (GB)
Title: Process for the preparation of dry rubber in finely divided solid condition by spraying latex in a drying atmosphere
IPC: C08C1/12
Filed: 1935-04-08
Abstract: In the process for preparing rubber powder by spraying latex in a drying atmosphere, the latex has mixed therewith a substance or substances, which during the drying forms a new substance which is deposited as a non-soluble, preferably non-hygroscopic, coating on the rubber particles.  Numerous examples are given.  Farina dissolved in acidified water, and a condensing agent such as formalin, phenol, or cresol, may be added to the latex, and form an insoluble resinous coating on drying.  Soluble proteins such as glue, and tanning agents such as formaldehyde or tannin may also be used, and also the ingredients of synthetic resins, as phenol and aldehyde, or the first stage condensation products themselves. Soluble inorganic substances which are rendered insoluble by heat may also be used.  Examples of these are soluble bicarbonates which are converted into insoluble carbonates during drying, and alkaline silicates.  Substances may also be added which react with the serum constituents.  Examples of these are lime dissolved in a sugar solution, zinc sulphate in ammoniacal solution, soluble silicates, or a small quantity of sulphur and zinc oxide, with or without accelerators, formaldehyde with anti-coagulants such as ammonia.  Soluble reaction products may be washed out of the powder, which may also be rendered less liable to agglomerate by dusting with talc, magnesium oxide, zinc stearate, tricalcium phosphate, or the like.  Specifications 316,006, [Class 70], and 388,341 are referred to.
Patent GB-159106-A (GB)
Title: Improvements in the treatment of raw rubber when freshly coagulated from the latex
IPC: B29B13/06
Filed: 1920-04-19
Abstract: 159,106. Davidson, S. C. April 19, 1920. Addition to 151,344. India-rubber, preparation of.-Apparatus for carrying out the process for dehydrating described in the parent Specification comprises a pin-plate l fitted with a relatively small number of pins l<1> capable of reciprocating vertically, synchronously with a step-by-step horizontal motion of a tray n carrying the mass of rubber to be perforated. A shaft a driven through a clutch e operated through links g, g<1>, g<3> carries an eccentric h by means of which pins l<1> are caused to reciprocate through a stripping-plate l<2> to pierce and compress a layer of rubber in a perforated tray n capable of sliding in a casting m formed with a drain m<1>. The tray n is moved forward by means of pawls o engaging racks n<2>, on each side of the tray. Each pawl o is mounted on a bell-crank lever o<1> on a spindle o<2> on which is also mounted an arm o<3> carrying a bolt o<5>. On the up-stroke when the pins l<1> are withdrawn from the rubber, a bracket o<4> on the pin-plate l comes in contact with nuts on the bolt o<5>, and further movement feeds the pawls o forward. The pawls are returned on the down-stroke by a spring p. To ensure the machine stopping with the pins withdrawn from the rubber on releasing the clutch, a slightly eccentric disc s is mounted on the shaft a, and bears at its farthest out point on a wooden brake s<2>.
Patent GB-494093-A (GB)
Title: Method and apparatus for controlling ships and like vessels
IPC: B63H9/02
Filed: 1937-04-16
Abstract: 494,093. Controlling rolling; steering. GAVRILOF, I. A. April 16, 1937, No. 10909. [Classes 113 (i) and 114] A device for controlling, rolling, pitching or yawing, or for steering ships, comprises stationary fins 1, of constant thickness except at its end, disposed in a longitudinal direction and projecting from the hull surface below the water. These fins contain rollers 2, situated in slots 4 in the fin, these rollers being of greater diameter than the fin thickness and are rotatable in either direction to produce a difference of pressure between the two faces of the fin as desired, and hence a thrust is obtained in a desired direction. Sets of fins are situated amidships to control rolling, at the ends to control pitching or yawing, or centrally at the stern for steering.
Patent GB-697791-A (GB)
Title: Improved process for making moulded articles, in particular boards, of cellulosic material
IPC: C08L61/24
Filed: 1950-05-03
Abstract: Moulded articles such as boards are obtained by digesting lignocellulosic material such as sawdust, optionally with the addition of barks, pine needles, leaves, straw, dry grass, peat and tans with aqueous alkali to decompose the lignocellulose, the amount of alkali being such that at the end of said treatment the aqueous phase is not alkaline, separating the bulk of the aqueous digestion liquid from the digested solid product, mixing the product with a synthetic resin which is insoluble in water in its finally condensed state and moulding the mixture by applying pressure and heat.  5-50 per cent of cork dust, wood flour, or defibrinated pulp may be added prior to or subsequent to alkali treatment.  The resin may be a phenol-or urea-formaldehyde thermosetting resin and may be incorporated in the dry state in solution or dispersion, or dispersed on a filler such as cork dust or leather dust.  Asbestos or glass fibres may be used as additional fillers.  The boards obtained may be faced with veneers, fibre sheets or metal foils and the surface may be rendered acid-proof, or water-repellent, by means of paraffin emulsions or drying oils.ALSO:Moulded articles such as boards are obtained by digesting lignocellulosic material such as sawdust optionally with the addition of barks, pine needles, leaves, straw, dry grass, peat and tans with aqueous alkali to decompose the lignocellulose, the amount of alkali being such that at the end of said treatment the aqueous phase is not alkaline separating the bulk of the aqueous digestion liquid from the digested solid product, mixing the product with a synthetic resin which is insoluble in water in its finally condensed state and moulding the mixture by applying pressure and heat.  Five to 50 per cent of cork dust, wood flour or defibrinated pulp may be added prior to or subsequent to alkali treatment.  The resin may be a phenol- or urea-formaldehyde thermosetting resin and may be incorporated in the dry state in solution or dispersion, or dispersed on a filler such as cork dust or leather dust.  Asbestos or glass fibres may be used as additional fillers.  The boards obtained may be faced with veneers, fibre sheets or metal foils and the surface may be rendered acidproof, or water repellant by means of paraffin emulsions or drying oils.
Patent GB-774476-A (GB)
Title: Improvements in or relating to spectrometers
IPC: G01N21/69
Filed: 1953-04-22
Abstract: 774,476. Spectrometers. TOUVET, G. April 22, 1953, No. 11010/53. Addition to 774,473. Class 97(1) [Also in Group XL(b)] In an emission spectrometer an electric discharge takes place between electrodes of or in the substance under examination this discharge being produced by radio frequency currents between the electrodes. Radio-frequency excitation enhances the production of light in certain parts of the spectrum as is explained in Specification 774,475. As shown the discharge tube 11 containing the electrodes under examination is energized by a radio frequency oscillator 10, the output from the source being focused by a lens 13 on to a slit 14 which lens is the focal plane of a collimating lens 15. The light proceeding from the lens is dispersed by a prism 16 and then further dispersed by a lens 17. A further slit 18 then isolates part of the spectrum which is concentrated by a lens 19 on to a photo-electric cell. This cell may be of the multiplier type. The output of the cell is fed to a radio-frequency amplifier 21 feeding the " Y " plates of a cathode ray tube 22. The spectrum is scanned across the slot by a motor 16 which rocks prism 16 and drives a potentiometer arm to give a gradually increasing voltage to the " X " plates of the tube. Thus the response of the photo-cell is plotted against wavelength on the screen of the cathode ray tube. The amplifier 21 may be tuned to a harmonic of the oscillator frequency. The radio-frequency oscillation may be applied in the form of discontinuous wave trains or may consist of recurring direct current pulses including transients as described in Specification 774,475 [Group XL(a)]. The light source may be arranged to produce a substantially point source by means of a distorting lens (Fig. 4, not shown). A pair of light sources may be compared by means of a rotating mirror driven intermittently by gearing from motor 28, this mirror being arranged to reflect light to the spectrometer from each source in turn. Alternatively the two sources may be mounted on a rotating platform so that each is presented in turn to the spectrometer. The two samples to be compared are connected in series during test. By utilizing electronic metal and a cathode ray tube screen of,high persistance the emission spectra of the two samples may appear side by side on the screen. Specification 774,741 [Group XL(b)] also is referred to.
Patent GB-564506-A (GB)
Title: Improvements in or relating to process of preparing products by condensation of aldehydes with polyhydroxy alkylamines
IPC: C07D498/04
Filed: 1942-08-08
Abstract: Condensation products of the probable formula <FORM:0564506/IV/1> where R = H, alkyl or alkylol, are prepared by mixing formaldehyde with a polyhydroxy alkylamine of the formula <FORM:0564506/IV/2> with gentle heating if necessary.  Alkylamines specified are 2-amino-, 2-amino-2-methyl-, 2-amino-2-methylol-, 2-amino-2-ethyl-, 2-amino-2 - ethylol-, and 2 - amino - 2 - isopropyl - 1,3-propane-diols.  These may be prepared by catalytic reduction of the nitrohydroxy compounds made by reacting aliphatic aldehydes with primary nitroparaffins. The condensation products are recovered by removing the water by evaporation, solvent extraction or azeotropic distillation with benzene, and may be purified by distillation or recrystallization. They may be reacted with fatty acids or isomerized fatty acids to produce esters useful as drying oils.  In examples: (1) tris(hydroxymethyl) amino-methane is dissolved in formalin and water evaporated at room temperature to give a solid product which is probably 3,4-oxydimethyl - 4 - methylol oxazolidine.  It is esterified with fatty acids of soya bean and linseed oils; (2) 2-methyl-2-amino-propanediol-1,3 is added to formalin, heated on a steam bath, cooled and the product extracted with ether.  The extract is dried and evaporated to give the liquid condensation product; (3) 2-ethyl-2-amino-propanediol-1,3 is mixed with formalin, cooled, ether extracted, and the product, after evaporation of ether, distilled under vacuum.  With linseed oil fatty acids it gives a drying oil.
Patent GB-1478855-A (GB)
Title: Hole piercing devices
IPC: B21D28/34
Filed: 1975-03-12
Abstract: 1478855 Punching A T PERRY and J  VEALE 12 March 1975 [13 March 1974] 11136/74 Heading B4B [Also in Division B3] A portable perforating device comprises a die 17 mounted on one arm 13 of a C frame by snap engagement of a spring loaded ball 16 with a groove 20 and a punch 37 similarly mounted on a spigot 33 and reciprocable relative to the other arm 12 by means of a screw 25. A support 22 in which the spigot 33 is mounted is prevented from rotating relative to the threaded sleeve 21 in which the screw 25 engages by a screw 24 located in a slot 23. The screw may be replaced by a fluid actuator or by a leveroperated sliding shaft. For forming non- circular holes, the punch 37 may be formed above its punching edge as a broach.